Angle-cock device



G. W. WILDIN ANGLE COCK DEVICE Fled'MaV- l2. 1925 INVENTOR GEORGEWWILD lN www@ ATTORNEY Patented oa. 26.1926.

UNI-TED. STATES PATENT OFFICE.

GEORGE W. WILDIN, -OE P ITTSBYURGH, EENNSYLVANIA, ASSIGNOR T THE WESTTNG- HOUSE AIR BRAKE COMPANY, 0F WILMERDING, PENNSYLVANIA, A CORPORA-'rIoN or PENNSYLVANIA.

Application led Hay 12, 1925 Serial No. 29,664.

This invention relates' to iiuid pressure controlling means and moreparticularly to anangle cook device for controlling the flow of fluidunder pressure through the brake pipe on railway trains'.

The standard angle cock, now in general use in connection with iiuidpressure braking systems on railway trains, comprises a cock body inwhich is vertically disposed a ta pered plug valve.. The small end ofthe plug valve extends out of the cock body and is adapted to receive anoperating handle, while the large end 'of said plug valve is exposed tothe pressure of lui'd in the brake pipe and to the pressure of a coilspring.'

Considerable pressure acting on the'large end of theplug valve isnecessary in order to ensure the tight seating of the plug valve, so

as to prevent leakage, but said. pressure also p functions to create agreat amount of resistance to rotative movement of the plug valve fromone position'to another, which, as will be evident, is undesirable.rlhev principal object of my inventionis to obviate the above diiiicultyby providing an angle ,cock in which the pressure acting to resist theturning movement of the plug valve is automatically relieved during thperiod when said plug valve is being rotat fromA one positiontoanother.v

In the accompanying drawing, Fig. 1 is a sectionalview of an angle cockdevice embodying my invention; Fig. 2 a plan view of the angle cockdevice; and Fig. 3 a fragmentary front elevational view of the anglecock device.

As shown in the drawing, the angle cock device may comprise a cock body1 having a conduit 2 and a tapered xopening for receiving the usualtapered plug valve 3, which is provided with a connecting port d. Theportion of the body castinor surrounding the; upper end of the tapered:7opening extends upwardly an'd is provided with an outwardly extendingannular flange.

'A cap plate 6 is mounted on the flange 5 and is provided withdiametrically opposite downwardly extending lu Si?? and 8, each having arecess orreceifving the iiange 5. In order to apply the cap platel 6 tothe flange 5, said flange is provided ywith opposite slots 9 andlO,which are located at an angle to the position which the lugs 7 and 8assume when the plug valve 3 is in open or closed surfaces,

ANGLE-cock Davrcn.

positions, so that when the lugs `74 and 8 ar'e inserted in slots 9 and10 and the cap 6 rotated to assembled position, the recesses in saidlugs will engage the ange in both open and closed position of plug valve3.

Engagmg the rectangular key portion' of the plug valve 3 andiree to movevertically thereon 1s a member 11, vwhich extends through a centralopening in the cap plate 6. A lug 12 extends upwardly from the plate 6and an operating handle 13 is pivotally mounted thereon by means `oLE apivot pin 14. The inner en'd of the handle 13 is forked and yencloses araised portion of the member 1l, `so that said member and consequentlthe plug valve 3 are operable by the hand e 13. In order .to lock thehandle 13 in its operating posltions, a tang 15 is provided on saidhandle andis adapted, in the open position of the plug valve 3, toengage a slot 16 in a quadrant 17 cast on the cock body 1, and in theclosed position of said plug valve to engage/a slot 18 in saidquadrant.. rlhe forked ends of the handle 13 are provided with cam outerface of `the member 11V so as to depress saidmember when the handle 13is raised. vA coil spring 19 is mounted in the chamber at the large endof the plug valve 3, and a spring plate 20 havingp'a `concave recess on.one face engages said ,spring I`at itsopposite face. A rocker. plate 21having a correspond'- ing convex'fpiiojection 22i'engaging the recess 1nthe spring plate 20,'isfifterposed between the sprlng plate 20 and theunder face of the plug valve 3.

In order to relieve the plug valve 3 of the:

pressure of spring 19, l provide two ,pins 23' and 24, which engagecorresponding recesses in the rocker parallel bores in the plug valve 3and cap plate 6 so-as to engage the inner face of the member 11atdiametricallyloppo'site points. A small coil spring 25 interposedbetween the rocker plate 21 and the plug valve 3 acts to preventunseating of the plug valve, when it is relieved of the pressure exertedby thespring 19; e

When it is desired to move the plug valve 3 from closed to openposition, the handle 13 is first raised so as to disengage the tang 15from slot 18 in the quadrant 17, so as to release the handle to permitof turning same. This movement of the handle 13 also acts to plate 21and extend through` which are adaptedto engage the' Ition lof saidhandle into engagement with the outerfaceol memberv 11 so as to depresssaid member, which acts through the pins 23 and 24', rocker plate 21 andspring plate 20 to compress the spring 19, thereby relieving the plugvalve 3 of the pressure'of said s ring.

The handle 13 is thenA rotated in a cloc wise 6. The combination withaivalve body and a plug valve mounted'in said body, ofa spring actinvron said valve and tending to seat the valve, posed between said valveand said spring, an operating handle 'for said valve, 'and meansoperated by said handle for moving said member, `to thereby relieve thevalve direction until the tan k15 engages slot 16 of the pressure ofsaid s ring. ,i

the yquadrant 17 ,fat w ichtime the port 4 will have establishedcommunication through u the conduit 2. LIt will be evidlnt that thedevice willy operate in alike manner in moving 'theplug valve from opento closed position. i

Having now described 1n invention, what I claim as new and desire tosecure by'Letters Patent, is

1. A valve body, a plug valve mounted in said body, a spring acting onvvsaid valve,

an operating handle for said valve, and

means operated by said handle for relieving the valve of the pressure ofsaid spring. 2. A valve body, a plug valve' mounted in said body, aspring acting on saidvalve, a pivoted handle for operating said valve,and means o erated upon pivotal movement of said han le forrelieving'th'e valve of the pressure of said spring.

3. A valve body, a plugvalve mounted in saidlbody, a spring acting onsaid valve, and means for automatically relieving the valve of thevpressure of said spring, upon' operation of said valve.

4. The combination w1th`a valve bodyv andsI a tapered plug valvemountedtherein, of a sprlng acting on said valve forpmain/taining thevalveseated, apivoted handle for operating said valve, and meansoperated upon a pivotal movement of said handle for relieving said valveof the pressure of said spring.

5. The combination with a valve body and a tapered plug valvemountedltherein, of a spring acting on said valve for maintaining thevalve seated, al handle for operating sai-d valve, means for lockinIsaid -handle in an operating position of t e valve, and

vmeans operated upon unlocking said handle for relieving said valve ofthe/pressure of said sprlng.- sf

7. The combinationwit a valve body and a movable member intera plugvalve mounted in Y`said body, of a Avalve seated, when the valve isrelieved of the pressure of the first spring.

8. -The combination with a valve body and a plug valve mounted in saidbody, of a spring acting .on said valve and tending to seat t e valve, amovable member interposed between said valve and said spring, anoperating handle for said valve, means operated by said -handle formoving said member to thereby relieve the valve of the pressure of saidspring, and a s ring interposed Eetween'said valve and sai movable mem-9. The combination with a valve body and a plug valve' mounted in saidb'ody, of a spring acting on said valve and tending to seat -the valve,a movable member interposed between said valve and said s rin@r ins enib, f

gaging said member and exteriding through openings in said valve, anoperating handle forsaid valve, and means operated, by said handle formoving said pins and thereby said member. v

10. The combination vwith a valve body and a y plug valve mountedtherein, of a lvertically movable handle for rotating said valve, asprinar acting on said valve, and means operated by the verticalmovement ofsaid handle gior relieving the valve of the pressure of lsaidsprin In 4testiIn/ony whereof I my hand.

have hereunto set GEORGE W. WILDIN.

